FuelTech Peak and Hold Manual De Instalación Y Operación página 4

This control is necessary for several reasons:
- Applying full power during injector opening can decrease dead
time, improving the response speed and ensuring linearity of the
whole set of injectors.
- Limitation of the nominal current to a value of ¼ of the opening
current is required to prevent the injector coil burn by excessive
power, lowering heat and extending its useful life.
- Limitation of the nominal current is also very important in the
injector closing, since the lower the energy stored in the coil, the
shorter the time required to close the injectormechanically. With
that is possible to achieve a fuel injection linearity even if it is
working already with 70%, 80% of its capacity, when the available
time to open and close is very little.
- When the coil is charged in excess, caused, for example, by a
defective control of the "hold" current or when this control simply
does not exist, the injector well before reaching 100% of its
opening "lock open", getting lost all ability to operate over the
range of 70% opening.
This driver has an accurate current control that isn't modified
due to variations of battery voltage, ensuring a perfect control
under any situation or defect of the vehicle electrical system.
Peak and Hold
EN
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